/*******************************************************************************
 * Copyright (c) 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * Contributors:
 * IBM Corporation - initial API and implementation
 ******************************************************************************/

package cn.elwy.rcp.ui.navigator.internal.workingsets;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerSorter;

/**
 * @since 3.2
 */
public class WorkingSetSorter extends ViewerSorter {

  public int compare(Viewer viewer, Object e1, Object e2) {
    if (viewer instanceof StructuredViewer) {
      ILabelProvider labelProvider = (ILabelProvider) ((StructuredViewer) viewer).getLabelProvider();
      String text1 = labelProvider.getText(e1);
      String text2 = labelProvider.getText(e2);
      if (text1 != null) {
        return text1.compareTo(text2);
      }
    }
    return -1;
  }

}
